In this clinical trial, pregnant women affected by hereditary thrombophilia (HT), suffering of ID and IDA, receive an oral administration of bovine Lf (bLf) 100 mg/twice a day or ferrous sulfate 520 mg/day. The number of red blood cells, the values of hemoglobin, total serum iron, serum ferritin, haematocrit, serum Interleukin-6 (IL-6) and prohepcidin are assayed before therapy, every 30 days until delivery.